The 15 car brands with the most gas guzzlers

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Accounting for the total costs of ownership is vital to consider when buying a car. Fuel efficiency inevitably makes a considerable impact, and finding an efficient car not only conserves natural resources, but also saves you dollars.

To help you avoid a purchase that could break the bank, AxleGeeks identified car brands with the most gas guzzlers in their lineups. To do this, we calculated the average city and highway mileage of each model line, weighed at 55 percent and 45 percent respectively. By averaging the fuel efficiency of each lineup, we arrived at a brand average, which we subsequently used to rank brands from most to least efficient.

Note: We excluded ultra-luxury brands, like Ferrari and Rolls-Royce that do not compete in mainstream or luxury markets.

#15. Ford

Ford earned a combined 24 miles per gallon across its lineup, a better fuel efficiency than its American non-luxury counterparts. However, Ford falls short when compared to the average 26 mpg among all non-luxury brands.

#13. Chrysler*

Though Chrysler performs well in highway driving, with three models averaging at least 25 mpg, its city mpg falls far below par: its average combined mpg sits at 23, a significant fall from the average of American non-luxury brands, which boast a combined 26 mpg.

#10. Ram

Ram’s vehicles manage only a combined 22 mpg, but because Ram manufactures trucks and vans almost exclusively, its fuel efficiency is bound to fall below its non-luxury competitors, which average a combined 26 mpg.

#9. Porsche

Porsche aims for power rather than efficiency: All of its vehicles generate at least 240 horsepower but average a combined fuel economy of only 21.75, a drop from the combined average of all luxury brands, which sits at 22 mpg.

#3. Dodge

Due to Dodge’s recent evolution into a performance brand, fuel efficiency has fallen from the list of priorities: The brand only averages 20.25 combined mpg across its lineup, a drop from the 22 combined mpg of all American non-luxury brands.

#2. Land Rover

Though Land Rover progressed in its pursuit of greater fuel efficiency and scores higher than British luxury brands, it still falls far behind the 22 combined mpg average of all luxury brands. However, because Land Rover primarily produces SUVs and crossovers, a low fuel efficiency is expected.

#1. GMC

GMC’s product line consists of SUVs, cargo vans and trucks — vehicles not known for great fuel efficiency. As a result, GMC’s combined 19 mpg across its lineup earns it the reputation of most gas guzzlers per lineup.